METHOD AND SYSTEM FOR MEASUREMENT OF INLAND AND FLOW CONTACT ANGLES, AS WELL AS SLIPPING OR ROLLING ANGLE Russian patent published in 2024 - IPC G01N13/02 G01N23/83 

FIELD: measuring equipment.

SUBSTANCE: invention relates to methods and systems for measuring the contact angle of inflow and outflow, as well as the angle of sliding or rolling. Essence: a sample of a material having a flat surface is placed in a radiolucent cell mounted on an adjustable platform that allows changing the angle of inclination along two orthogonal axes, one of which coincides with the X-ray shooting plane, and connected to a device for filling the cell with the first fluid and to the second fluid drop formation device. The platform, on which the radiolucent cell is mounted, is adjusted so that the flat surface of the sample becomes horizontal. The radiolucent cell is filled with the first fluid. An X-ray photograph of the cell with the installed sample and filled with the first fluid is performed, the sample area in the image is retouched to simulate the absence of the sample in the cell filled with the first fluid, the retouched image is stored as the background image. The second fluid is introduced into the first fluid in order to form a lying drop of the second fluid on the flat surface of the sample, until the drop remains on the surface, the angle of inclination of the platform is increased by a given angle, X-ray photography is carried out of the cell filled with the first fluid and a drop of the second fluid on inclined surface of the sample, contrast images are obtained by joint processing of the background and captured images. For contrasted images, the edge angles of inflow and outflow are calculated for the current angle of inclination, and the angle of sliding or rolling is calculated.

EFFECT: ability to measure the values of the contact angles of inflow and outflow, as well as the angle of sliding or rolling, for a drop of fluid lying on an inclined surface of a sample surrounded by another fluid, regardless of the optical transparency of the fluids under study.

8 cl, 4 dwg